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Johannes Kehrer

Research fellow in Visualization

(Forsker i Visualisering)
!!! Johannes Kehrer is no longer employed at the University of Bergen.
For contact information, please visit the website of his new employer.


Former supervisor: Helwig Hauser
Private website: (in German)

Short Biography (CV)

Johannes Kehrer is now a research assistant at the Institute of Computer Graphics and Algorithms, Vienna University of Technology, Austria.  He received the MSc degree in visual computing from the same university in 2007.  He then worked as a research fellow in visualization at the Department of Informatics, University of Bergen, Norway, and received the PhD degree in 2011.  In 2012, he was a researcher in the area of visual analysis at the VRVis Research Center in Vienna, Austria.  His interests include the interactive visual analysis of multi-run, multi-variate, and spatiotemporal data (primarily from the application fields of climate research and engineering).  He has cooperated with several climate and meteorological institutes.

Research Interests

Interactive Visual Analysis and Exploration

... (aka. visual analytics) aims at iterative information drill-down in complex data exploration scenarios:

Interactive Visual Analysis   time-dependent data,
  multi-variate data,
  higher dimensional data,
  large datasets, etc.


Introd. to Programming Methodology (INF100)
Teaching Assistant, Autumn 2010 & Spring 2011
Program Dev. Methodologies (INF101)
Teaching Assistant, Spring 2010
Computer Graphics (INF251)
Teaching Assistant, Spring 2008
Visualization (INF252)
Teaching Assistant, Autumn 2008 & 2009
Selected Topics in Visualization (INF359)
Teaching Assistant, Spring 2009

Finished Student Work

Data converters for SimVis / ComVis
Stian Eikeland (co-supervised by H. Hauser, Autumn 2008)
Glyphs for Multi-variate Data Visualization
Andreas Lie (co-supervised by H. Hauser, Autumn 2008)
Looking for an interesting programming project? Contact me for available topics.

Other Activities



Interactive Visual Analysis of Multi-faceted Scientific Data by J. Kehrer.
PhD Thesis, Department of Informatics, University of Bergen, March 2011.
Integrating Interactive Visual Analysis of Large Time Series into the SimVis System
by J. Kehrer.  Master Thesis, Vienna University of Technology, Oct. 2007.

Journal Articles

Visualization and Visual Analysis of Multi-faceted Scientific Data: a Survey by J. Kehrer and H. Hauser.  IEEE Transactions on Visualization and Computer Graphics, 19(3):495-513, March 2013.
Interactive Visual Analysis of Heterogeneous Scientific Data across an Interface by J. Kehrer, P. Muigg, H. Doleisch,
and H. Hauser.  IEEE Transactions on Visualization and Computer Graphics, 17(7):934-946, July 2011.
Brushing Moments in Interactive Visual Analysis
by J. Kehrer, P. Filzmoser, and H. Hauser. Computer Graphics Forum, 29(3):813-822, June 2010.
Exploration of Climate Data Using Interactive Visualization by F. Ladstädter, A.K. Steiner, B.C. Lackner, B. Pirscher, G. Kirchengast, J. Kehrer, H. Hauser,
P. Muigg, and H. Doleisch.  Journal of Atmospheric and Oceanic Technology, 27(4):667-679, 2010.
Hypothesis Generation in Climate Research with Interactive Visual Data Exploration
by J. Kehrer, F. Ladstädter, P. Muigg, H. Doleisch, A. Steiner, and H. Hauser.  IEEE Transactions on Visualization and Computer Graphics, 14(6):1579-1586, Nov./Dec. 2008.
A Four-level Focus+Context Approach to Interactive Visual Analysis of Temporal Features
in Large Scientific Data

by P. Muigg, J. Kehrer, S. Oeltze, H. Piringer, H. Doleisch, B. Preim, and H. Hauser.  Computer Graphics Forum, 27(3):775-782, May 2008.

Other Publications

Visual Analysis of Multivariate Movement Data Using Interactive Difference Views by O. Daae Lampe, J. Kehrer, and H. Hauser.  In Proc. Vision, Modeling,
and Visualization (VMV 2010)
, pages 315-322, 2010.
Critical Design and Realization Aspects of Glyph-based 3D Data Visualization
by A.E. Lie, J. Kehrer, and H. Hauser.
In Proc. Spring Conference on Computer Graphics (SCCG 2009), pages 27-34, 2009.
SimVis: An Interactive Visual Field Exploration Tool applied to Climate Research
by F. Ladstädter, A.K. Steiner, B.C. Lackner, G. Kirchengast, P. Muigg, J. Kehrer, and H. Doleisch.  In New Horizons in Occultation Research: Studies in Atmosphere and Climate, pages 235-245, Springer, 2009.

Mailing address: Dep. of Informatics, Univ. of Bergen, Postboks 7803, N-5020 Bergen, Norway ("c/o <addressee>");
Visiting address: Etasje 3, data blokk, Høyteknologisenteret, Thormøhlensgate 55, Bergen, Norway;
FAX (for all team members): +47 - 55 58 41 99 (please indicate addressee with a "c/o ..." phrase).

 Last change: Johannes Kehrer, 2012-02-01